Add internal/lib/driver_test_lib.py to fix unit tests.

Add a script to run all unit tests.
Test: tools/acloud/run_tests.sh
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..415166b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.pyc
+*.*~